Petroleum County, Montana, United States

Last updated: 4:55 PM CDT · Refresh

22°C

Feels like 16°

Mostly Clear

▲ 24° / ▼ 7°

Wind

17 mph SE

Humidity

33%

Dew Point

6°

Pressure

26.84 inHg

Visibility

10 mi

UV Index

6.6

Cloud Cover

15%

Sunrise

6:47 AM

Sunset

7:28 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Petroleum County is currently mostly clear at 22°C. Precipitation is likely — peak probability 77% around 3 AM. Sunrise: 6:47AM · Sunset: 7:28PM.

34 AQI · Good Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

22°

4 PM

23°

5 PM

24°

6 PM

22°

14%

7 PM

20°

14%

8 PM

19°

21%

9 PM

16°

32%

10 PM

15°

38%

11 PM

14°

46%

12 AM

13°

56%

1 AM

12°

70%

2 AM

11°

74%

3 AM

11°

77%

4 AM

10°

44%

5 AM

7°

47%

6 AM

7°

47%

7 AM

8°

37%

8 AM

8°

27%

9 AM

10°

27%

10 AM

13°

24%

11 AM

14°

15%

12 PM

14°

14%

1 PM

16°

14%

2 PM

16°

14%

7-Day Forecast

Today

24° 7°

Clear with a 32% chance of rain.

Mon

21° 7°

Mostly Cloudy with a 77% chance of rain.

Tue

19° 4°

Partly Cloudy.

Wed

21° 6°

Clear with a 38% chance of rain.

Thu

29° 9°

Mostly Clear with a 52% chance of rain.

Fri

26° 12°

Rain, 78% chance.

Sat

26° 13°

Drizzle, 60% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 22° Mostly Clear 5% 17 mph SE 33%

4 PM 23° Clear 6% 15 mph SE 32%

5 PM 24° Clear 6% 14 mph SE 33%

6 PM 22° Clear 14% 10 mph ESE 37%

7 PM 20° Clear 14% 8 mph ESE 42%

8 PM 19° Clear 21% 7 mph NE 47%

9 PM 16° Clear 32% 7 mph NNW 52%

10 PM 15° Mostly Clear 38% 8 mph NW 58%

11 PM 14° Partly Cloudy 46% 13 mph NW 66%

12 AM 13° Mostly Cloudy 56% 18 mph NW 69%

1 AM 12° Mostly Cloudy 70% 21 mph NW 73%

2 AM 11° Rain 74% 23 mph NW 74%

3 AM 11° Rain 77% 20 mph NW 73%

4 AM 10° Overcast 44% 20 mph NW 74%

5 AM 7° Mostly Cloudy 47% 17 mph WNW 74%

6 AM 7° Overcast 47% 14 mph WNW 72%

7 AM 8° Overcast 37% 14 mph WNW 68%

8 AM 8° Overcast 27% 14 mph W 64%

9 AM 10° Overcast 27% 15 mph W 61%

10 AM 13° Overcast 24% 16 mph W 57%

11 AM 14° Mostly Cloudy 15% 18 mph W 54%

12 PM 14° Mostly Cloudy 14% 19 mph WNW 54%

1 PM 16° Partly Cloudy 14% 20 mph WNW 54%

2 PM 16° Partly Cloudy 14% 22 mph WNW 54%

15-Day Forecast

Today

9/13

Clear

32%

7°

24°

Mon

9/14

Mostly Cloudy

77%

7°

21°

Tue

9/15

Partly Cloudy

4°

19°

Wed

9/16

Clear

38%

6°

21°

Thu

9/17

Mostly Clear

52%

9°

29°

Fri

9/18

Rain

78%

12°

26°

Sat

9/19

Drizzle

60%

13°

26°

Sun

9/20

Partly Cloudy

35%

12°

27°

Mon

9/21

Clear

25%

9°

27°

Tue

9/22

Mostly Clear

44%

10°

28°

Wed

9/23

Clear

60%

10°

27°

Thu

9/24

Drizzle

60%

13°

25°

Fri

9/25

Drizzle

60%

12°

23°

Sat

9/26

Drizzle

60%

11°

23°

Sun

9/27

Drizzle

60%

11°

23°

Good

U.S. Air Quality Index · Dominant: O3

50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

16 AQI 2.9 µg/m³

O₃

Ground-level ozone

Dominant

34 AQI 37 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Mon 34 Good 34 16

Tue 34 Good 34 23

Wed 31 Good 31 16

About the Air Quality Index

0–50 Good

51–100 Moderate

101–150 Unhealthy for Sensitive Groups

151–200 Unhealthy

201–300 Very Unhealthy

301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Sun Sep 13, 20:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE0 J/kg

MLCAPE13 J/kg

MUCAPE142 J/kg

SBCIN—

MLCIN-320 J/kg

Lifted Index1.4

Kinematics

0–6 km Shear52 kt

0–1 km Shear13 kt

Eff. Shear19 kt

0–1 km SRH7

0–3 km SRH57

Eff. SRH-11

Storm Motion252° @ 19 kt

0–1 km EHI0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index29.4

Thermo & Levels

PWAT0.87 in

0–3 km LR7.3 °C/km

700–500 LR8.4 °C/km

Total Totals52.5

LCL712 hPa

LFC—

EL—

Freezing Lvl9,902 ft

Petroleum County, Montana, United States

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